Cold streams of ionospheric oxygen in the plasma sheet during the CDAW 6 event of March 22, 1979

Details Cold streams of ionospheric oxygen in the plasma sheet during the CDAW 6 event of March 22, 1979 Cold streams of ionospheric oxygen in the plasma sheet during the CDAW 6 event of March 22, 1979

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.4091o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, May 1, 1985, p. 4091-4098. Sponsorship: Swiss National Science Founda

Physics

11

Ionospheric Storms, Magnetospheric Instability, Oxygen Ions, Plasma Layers, Geomagnetism, International Sun Earth Explorers, Ionospheric Drift, Magnetic Field Configurations

Scientific paper

During magnetospheric substorm events, the plasma and ion composition experiments in the ISEE-1 and 2 satellites detected cold ionospheric O+ streams, moving tailwards in the near earth magnetotail. Flow is parallel to the magnetic field lines, with drift velocity in agreement with the electric field topology obtained by mapping the model ionospheric field along the magnetic field lines. Fluctuations of the flow velocity of the streams can be related to magnetotail movements. Oscillations of the flow direction and speed with periods ranging from 5 to 10 min that suggest the presence of waves are observed. The streams are observed at all distances between 15 and 6 Re from the earth. When averaged over 360 deg, the streams show up as a low energy peak, superimposed on the distribution of isotropic plasma sheet ions. This double-peak structure of the energy spectrum seems typical of the disturbed plasma sheet.

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